Harley Davidson Exhaust Systems
The top three reasons why Harley-Davidson owners decide to replace their OEM exhaust systems are for better performance, sound, and appearance. Some riders are all about performance so the look and sound of an exhaust system isn't really a factor. Others are more into sound and style so performance isn't a priority to them. Whether you are a street racer, bar hopper, or somewhere in between will determine which of these aftermarket exhaust products are best for you.
Slip-On Mufflers
The rider who is not as concerned with performance or looks and just wants "that Harley sound" is best suited by a set of slip-on mufflers. These mufflers come in different styles but really don't look much different than stock overall. However, they are less restrictive so they put out more sound with some minor gains in performance. Slip-on mufflers bolt right onto OEM header pipes so they are also a popular choice with the more budget conscious riders.
2-into-2 Exhaust System
For the rider who wants it all, there is the 2-into-2 system. This is a complete system that replaces the OEM header pipes and mufflers. Most 2-into-2 systems, especially the stepped header systems, will look, sound, and perform better than any stock exhaust system. There are literally hundreds, if not thousands, of styles and finishes to choose from making the 2-into-2 systems a very popular choice amongst Harley owners.
2-into-1 Exhaust System
The performance minded rider runs a 2-into-1 performance pipe. With this type of exhaust system, the front and rear header pipes merge into one collector for increased torque and horsepower. It may not look as cool as some of those fancy 2-into-2 systems but it doesn't really matter because you're moving too fast for anyone to see it.
So there is the basic breakdown of aftermarket Harley exhaust systems. If you decide to install a full system, be sure to replace your exhaust port gaskets. Depending on whether the bike is carbureted or fuel injected, be sure to purchase the proper jet kit or EFI controller for your application. If you do not already have a higher flowing aftermarket air cleaner, it is recommended that you install one at this time. The motor could use more air as well as fuel to achieve optimum performance and fuel economy.
